/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */

package org.apache.commons.exec.launcher;

import java.util.Properties;

import org.apache.commons.exec.OS;

/**
 * Builds a command launcher for the OS and JVM we are running under.
 *
 */
public final class CommandLauncherFactory {

	private CommandLauncherFactory() {
	}

	/**
	 * Factory method to create an appropriate launcher.
	 *
	 * @return the command launcher
	 */
	public static CommandLauncher createVMLauncher() {
		return createVMLauncher(new Properties());
	}
	
	public static CommandLauncher createVMLauncher(final Properties properties) {
		// Try using a JDK 1.3 launcher
		CommandLauncher launcher;
		if (OS.isFamilyOpenVms()) {
			launcher = new VmsCommandLauncher();
		} else {
			boolean redirectErrorStream = Boolean.parseBoolean(properties.getProperty("redirectErrorStream", "false"));
			launcher = new Java13CommandLauncher(redirectErrorStream);
		}
		return launcher;
	}
}
